Although I agree in principle with Dean that 45 Degrees would be ideal, most of the squeegees I have worked with have been 60 Degrees to the stencil surface. This seems to work best with metal squeegees when printing HASL boards, because the slightly uneven pad surface can lead to the paste "bleeding" if the printing pressure is too high (i.e. you don't get a good seal between the edge of the stencil aperture and the pad surface).

| Tony | | Although I agree in principle with Dean that 45 Degrees would be ideal, most of the squeegees I have worked with have been 60 Degrees to the stencil surface. This seems to work best with metal squeegees when printing HASL boards, because the slightly uneven pad surface can lead to the paste "bleeding" if the printing pressure is too high (i.e. you don't get a good seal between the edge of the stencil aperture and the pad surface). | | Also, check out Dek's ProFlow and MPM's RheoPump systems. | | Regards | Scott Davies | Thanks for the feed-back Scott and Dean, I will be doing a DOE using these two angles.